package net.kunyv.util;


import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.CellRangeAddress;
import org.apache.poi.hssf.util.HSSFColor;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;

public class ExcelUtil {

    //文件名
    private String fileName;
    //列名
    private List<String> titleList;

    private List<LinkedHashMap<String, Object>> dataList = new ArrayList<LinkedHashMap<String, Object>>();

    HttpServletResponse response;

    /**
     * 导出Excel文件构造方法
     *
     * @param fileName
     * @param titleList
     * @param dataList
     * @return
     * @throw
     * @author sunyb
     * @date
     */
    public ExcelUtil(String fileName, List<String> titleList, List<LinkedHashMap<String, Object>> dataList) {

        this.dataList = dataList;
        this.titleList = titleList;
        this.fileName = fileName;
    }

    /*
     * 导出数据
     * */
    public void export(HttpServletResponse response) throws IOException {
        HSSFWorkbook workbook = new HSSFWorkbook();                        // 创建工作簿对象
        HSSFSheet sheet = workbook.createSheet("缴税记录");                    // 创建工作表

        // 产生表格标题行
        HSSFRow rowm = sheet.createRow(0);
        HSSFCell cellTiltle = rowm.createCell(0);

        //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面  - 可扩展】
        HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象
        HSSFCellStyle style = this.getStyle(workbook);                    //单元格样式对象

        sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, (titleList.size() - 1)));
        cellTiltle.setCellStyle(columnTopStyle);
        cellTiltle.setCellValue("纳税人名称：中华人民共和国广州海事局       纳税人编码：725960965");
        // 定义所需列数
        int columnNum = titleList.size();
        HSSFRow rowtitleList = sheet.createRow(1);                // 在索引2的位置创建行(最顶端的行开始的第二行)

        // 将列头设置到sheet的单元格中
        for (int n = 0; n < columnNum; n++) {
            HSSFCell celltitleList = rowtitleList.createCell(n);                //创建列头对应个数的单元格
            celltitleList.setCellType(HSSFCell.CELL_TYPE_STRING);                //设置列头单元格的数据类型
            HSSFRichTextString text = new HSSFRichTextString(titleList.get(n));
            celltitleList.setCellValue(text);                                    //设置列头单元格的值
            celltitleList.setCellStyle(columnTopStyle);                        //设置列头单元格样式
        }

        //将查询出的数据设置到sheet对应的单元格中
        for (int i = 0; i < dataList.size(); i++) {

            HashMap<String, Object> map = dataList.get(i);//遍历每个对象
            HSSFRow row = sheet.createRow(i + 3);//创建所需的行数
            int j = 0;
            for (String key : map.keySet()) {
                HSSFCell cell = null;   //设置单元格的数据类型
                cell = row.createCell(j, HSSFCell.CELL_TYPE_STRING);
                if (map.get(key) != null) {
                    cell.setCellValue(map.get(key).toString());                        //设置单元格的值
                    sheet.setColumnWidth(j, map.get(key).toString().getBytes().length * 2 * 256);
                }
                cell.setCellStyle(style);
                j++;
            }
        }

        if (workbook != null) {
            String headStr = "attachment; filename=\"" + java.net.URLEncoder.encode(fileName, "UTF-8") + "\"";
            response.setCharacterEncoding("UTF-8");
            response.setContentType("APPLICATION/OCTET-STREAM");
            response.setHeader("Content-Disposition", headStr);
            OutputStream out = response.getOutputStream();
            workbook.write(out);
            out.flush();
        }
    }

    /*
     * 列头单元格样式
     */
    public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {

        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        font.setFontHeightInPoints((short) 11);
        //字体加粗
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //设置字体名字
        font.setFontName("Courier New");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        //设置底边框颜色;
        style.setBottomBorderColor(HSSFColor.BLACK.index);
        //设置左边框;
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        //设置左边框颜色;
        style.setLeftBorderColor(HSSFColor.BLACK.index);
        style.setFillBackgroundColor(HSSFColor.YELLOW.index);
        //设置右边框;
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        //设置右边框颜色;
        style.setRightBorderColor(HSSFColor.BLACK.index);
        //设置顶边框;
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        //设置顶边框颜色;
        style.setTopBorderColor(HSSFColor.BLACK.index);
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

        return style;

    }

    /*
     * 列数据信息单元格样式
     */
    public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
        // 设置字体
        HSSFFont font = workbook.createFont();
        //设置字体大小
        //font.setFontHeightInPoints((short)10);
        //字体加粗
        //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        //设置字体名字
        font.setFontName("Courier New");
        //设置样式;
        HSSFCellStyle style = workbook.createCellStyle();
        //设置底边框;
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        //设置底边框颜色;
        style.setBottomBorderColor(HSSFColor.BLACK.index);
        //设置左边框;
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        //设置左边框颜色;
        style.setLeftBorderColor(HSSFColor.BLACK.index);
        //设置右边框;
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);
        //设置右边框颜色;
        style.setRightBorderColor(HSSFColor.BLACK.index);
        //设置顶边框;
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);
        //设置顶边框颜色;
        style.setTopBorderColor(HSSFColor.BLACK.index);
        //在样式用应用设置的字体;
        style.setFont(font);
        //设置自动换行;
        style.setWrapText(false);
        //设置水平对齐的样式为居中对齐;
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        //设置垂直对齐的样式为居中对齐;
        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

        return style;

    }
}
